I'm so sorry for the mistake... I mean:
I think it is to slow when I make a SELECT later in this form:
I don't think its possible to do what you want in a single statement. Since LAST_INSERT_ID() is set to the last insert id of the connection... and the row you are inserting doesn't exist.. well.. until you create it, it will always either be zero or the record BEFORE your next insert, ie: INSERT INTO testtable(NULL,LAST_INSERT_ID()); INSERT INTO testtable(NULL,LAST_INSERT_ID()); would produce ID CRC32ID 1 0 2 1 You could run an update immediately after the insert to set the CRC32 column: UPDATE testtable SET id-crc=CRC32(LAST_INSERT_ID()) WHERE id=LAST_INSERT_ID(); Not quite sure why you need the CRC32 value of the ID, will it not always be the same value for the given ID number? Wouldn't it be easier to do it on the select side of the equation? SELECT id,CRC32(id) AS id-crc... FROM testtable... -jw On Sun, May 3, 2009 at 7:16 AM, thun...@isfahan.at <thun...@isfahan.at>wrote:Hello, I have a questions and I hope, that is possible in MySQL. I have the following short Table. CREATE TABLE IF NOT EXISTS `testtable` ( `id` bigint(20) unsigned NOT NULL auto_increment, `id-crc` bigint(20) unsigned NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `id-crc` (`id-crc`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ; `id` is the unique autoincrement in `id-crc` I would like save the CRC32 from `id` (the coloumn is unique) E.G. id id-crc -------------------- 1 2212294583 --> CRC32('1') 2 450215437 --> CRC32('2') 3 1842515611 --> CRC32('3') I would like insert the CRC32 directly when I make a new Insert. E.G. INSERT INTO `db283796092`.`testtable` ( `id` , `id-crc` ) VALUES ( NULL , LAST_INSERT_ID() ); But LAST_INSERT_ID() is 0!!!! How can I make that, that he use the actual INSERT-ID? Best regards Thunder -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=joh...@pixelated.net
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